Anyone else experiencing slow sync?

Lately it seems the batch upload / download methods seem to 'hang' forever and don't timeout (no matter how long you let the request running). I'm frequently receiving reports of the app syncing endlessly, and upon closer examination it's almost always when our app is batch uploading or simply deleting files one after another.

I can't figure out what's going on, but quitting and relaunching the app seems to work - until it hangs again. It looks as though the requests / url sessions at times never finish or aren't being cleaned up properly perhaps. I'm not sure. But wondering if someone else is experiencing something similar?